=>

1. Children shouldn't lie to their parents.

-> shouldn't V : không nên làm gì

2. Tokyo is the largest of the three cities.

-> so sánh nhất the adj-est

3. We mustn't throw rubbish.

-> mustn't V : không được phép làm gì

4. I like the living room best in the house.

-> like best ~ favourite 

1 I'm not happy when children lie to parents
Children should't not lie to parents

2: Ha noi is large, Bangkok is larger and Tokyo is the largest .

Tokyo is largest city in the three cities.

3: It is wrong of us to throw rubbish .

We mustn`t throw rubbish

4: My favourite room in the house is the living room.

 I like.......the living room the best in the house. ....... ........ ........